Json virtual object

[Evens]

Hi,

Do any have an example of how to mass greate virtual objects in json?

BR Even Sundgot.

[admin]

Why not use a script with grp.create in a loop? What kind of objects do you want to create?

[Evens]

That`s probably just as good. Im doing some testing and want to create 200 objects like this:
BACnet_001 to BACnet_200
And I want them to start at 32\1\1

Datatype 1 Byte scale

[admin]

Code:

for i = 1, 200 do
  name = string.format('BACnet_%03d', i)
  grp.create({
     name = name,
     address = '32/1/' .. i,
     datatype = dt.scale,
  })
end

[Evens]

Code:

for i = 1, 200 do
 name = string.format('BACnet_%03d', i)
 grp.create({
    name = name,
    address = '32/1/' .. i,
    datatype = dt.scale,
 })
end

Perfect! 

Thanks!

[Evens]

Is there any way to add the same script to several objects, but with one thing changing everytime?

I have this script that i want to add to 200 objects, but the ID needs to be changed everytime.
from 65793 to 65992

require('bacnet')

value = event.getvalue()

bacnet.write(127001, 'analog value', 65809, value)

[admin]

You can attach event script to a tag. Use event.dstraw to calculate BACnet object id from the group address that triggered the script.

[Evens]

Can you give me an example of this?

[admin]

First, add a certain tag to all objects via mass edit. Then create an event script which is mapped to the tag you've added. If your range is 32/1/1..32/1/200 then you don't need any extra conversion since it is 65793..65992 in numeric form.

Code:

require('bacnet')

value = event.getvalue()

bacnet.write(127001, 'analog value', event.dstraw, value)

[Evens]

First, add a certain tag to all objects via mass edit. Then create an event script which is mapped to the tag you've added. If your range is 32/1/1..32/1/200 then you don't need any extra conversion since it is 65793..65992 in numeric form.

Code:

require('bacnet')

value = event.getvalue()

bacnet.write(127001, 'analog value', event.dstraw, value)

I dont understand how, but it works! 

Thanks!

[Evens]

Is there any way to adjust this script to match the range 32/2/1 - 32/2/250 and 32/3/1 - 32/3/250 (all have the same Tag)
I have 500 objects that i want to link to ID 0- 500.

[Daniel]

Is there any way to adjust this script to match the range 32/2/1 - 32/2/250 and 32/3/1 - 32/3/250 (all have the same Tag)
I have 500 objects that i want to link to ID 0- 500.

Nothing has to be modified it will work.  your bacnet range will be 66049 - 66290 and 66305 - 66554

[admin]

event.dstraw is an integer value of group address. You can easily convert to a 0..499 range like this:

Code:

id = event.dstraw

if 66049 <= id and id <= 66290 then
  id = id - 66049
elseif 66305 <= id and id <= 66554 then
  id = id - 66305 + 250
else
  return
end

value = event.getvalue()
bacnet.write(127001, 'analog value', id, value)

[Evens]

Thanks!
I can’t get it to work properly. maybe I’m doing something wrong.
How do you convert from Group Address to the number?

[admin]

H/M/L
H * 2048 + M * 256 + L

[Evens]

Thanks!

This event.dstraw, do you have an easy explanation for it, I’d like to understand what it does.

[admin]

event.dst is group address that triggered the script in H/M/L format, event.dstraw is the same address but in numeric form.

[Evens]

Thanks, Now i understand